Finding the Fourth Proportional to 9,904.32, 13,667.40 and 5,427.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,904.32 : 13,667.40 = 5,427.18 : x
2. Step 2: Convert to fraction form
   9,904.32/13,667.40 = 5,427.18/x
3. Step 3: Cross multiply
   9,904.32x = 13,667.40 × 5,427.18
4. Step 4: Simplify right side
   9,904.32x = 74,175,439.93
5. Step 5: Solve for x
   x = 74,175,439.93/9,904.32
6. Step 6: Final answer
   x = 7,489.20